<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <div id="app">
    {{ 20 | currency }}
    <home></home>
  </div>
  <script src="./vue.js"></script>
  <script>
   
    const Home = {
      template: `
        <div>
          <h2>这是父组件</h2>  
          {{ num| currency }}
        </div>
      `,
      data(){
        return {
          num: 10
        }
      },
      filters: {
        currency: (v, sign='￥') =>{
          return sign+v
        }
      }
    }
    Vue.component('Home', Home)
    const vm = new Vue({
      el: '#app',
      data: {
        isShow: true
      }
    })
  </script>
</body>
</html>